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Fire condensates and charcoals : Chemical composition and fuel source identification

Title data

Kappenberg, Arne ; Braun, Melanie ; Amelung, Wulf ; Lehndorff, Eva:
Fire condensates and charcoals : Chemical composition and fuel source identification.
In: Organic Geochemistry. Vol. 130 (April 2019) . - pp. 43-50.
ISSN 1873-5290
DOI: https://doi.org/10.1016/j.orggeochem.2019.01.009

Abstract in another language

Fire condensates from vegetation and household burnings occur ubiquitously in the environment. Until now, however, it was difficult to estimate their origin and any relation to pyrogenic carbon deposited as charcoal. Our aim here was: (i) to differentiate the chemical composition of fire condensates from charcoal particles, and (ii) to relate this to fuel origins from grass, softwood or hardwood. We analysed δ13C and δ15N isotope composition, lignin-derived phenols, benzene polycarboxylic acids (BPCA) and polycyclic aromatic hydrocarbons (PAH), in lab-produced charcoals and condensates at combustion temperatures of 300, 350, 400, 450, 500 and 600 °C. We found that the BPCA and PAH composition of condensates differed significantly from that of charcoals. Condensates exhibited larger portions of benzene penta- to hexacarboxylic acids (B5CA to B6CA), phenanthrene (p < 0.01) and four-ring PAH (fluoranthene, pyrene, chrysene and benz[a]anthracene, p < 0.01). PAH ratios of indeno[1,2,3-cd]pyrene to benzo[ghi]perylene (IP/(IP + B[ghi]P) and fluoranthene to pyrene (Flua/(Flua + Py) were diagnostic for condensates, but independent from fuel type. Composition of the 1,2-, 1,7- and 2,6|3,5 dimethylphenanthrenes (DMP) was fuel specific, with the ratio of the (1,7 + 2,6|3,5)/(1,2 + 1,7 + 2,6|3,5) isomers separating hardwood (0.2–0.6), from grass (0.6–0.9), and softwood (<0.9), thus enabling the identification of both condensate and charcoal fuel sources.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER151458
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology > Chair Soil Ecology - Univ.-Prof. Dr. Eva Lehndorff
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 550 Earth sciences, geology
Date Deposited: 22 Jan 2020 07:40
Last Modified: 22 Jan 2020 07:40
URI: https://eref.uni-bayreuth.de/id/eprint/53848